2916-31-6Relevant articles and documents
Study of the catalytic activity of aluminum, zirconium and cerium pillared clays in the synthesis of 2,2-dimethyl-1,3-dioxolane
Mnasri, Saida,Besbes, Neji,Frini-Srasra, Najoua,Srasra, Ezzeddine
, p. 437 - 443 (2012)
The purified Tunisian clay G and the commercialized American clay W were pillared with zirconium, aluminum and mixed pillars zirconium-aluminum, cerium-zirconium, cerium-aluminum, and cerium-zirconium-aluminum. These different clays were used in the synthesis of 2,2-dimethyl-1,3-dioxolane 3 by acetalyzation of acetone 2 with ethylene glycol 1 under autogenously pressure and without solvent. Results indicate that the yield of product 3 depends of the nature and the acidity of the clay used and the time of reaction.
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Leutner
, p. 317,325 (1932)
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Synthesis of Asphaltene-Based Strongly Acidic Sulfonated Cation Exchangers and Determination of Their Catalytic Properties in the 2,2-Dimethyl-1,3-Dioxolane Synthesis Reaction
Borisov, D. N.,Foss, L. E.,Musin, L. I.,Musin, R. Z.,Nagornova, O. A.,Salikhov, R. Z.,Shabalin, K. V.,Yakubov, M. R.
, p. 709 - 715 (2020)
Abstract: Results of a study of the reaction products of asphaltene sulfonation with sulfuric acid in various temperature and time ranges have been described. The maximum sulfur content in sulfonated cation exchangers at an asphaltene sulfonation temperature of 100 and 120°С and a reaction time of 2 h has been determined. The maximum static exchange capacity of 4.3 meq/g has been found for the products of sulfonation with a sulfuric acid–oleum mixture. The asphaltene-based strongly acidic sulfocationite has been tested in the 2,2-dimethyl-1,3-dioxolane synthesis reaction.
Crystallinity after decarboxylation of a metal-carboxylate framework: indestructible porosity for catalysis
Cheng, Shengxian,Feng, Weijin,Gao, Wenpei,He, Jun,Hu, Jieying,Pan, Xiaoqing,Tieu, Peter,Xu, Zhengtao
, p. 11902 - 11910 (2020/09/21)
We report a curious case study of a Zr(iv)-carboxylate framework, which retains significant crystalline order after cascade thermocyclization of its linker components, and - more notably - after the crucial carboxylate links were severed by heat. Vigorous heat treatment (e.g., 450 °C and above) benzannulates the multiple alkyne groups on the linker to generate linked nanographene blocks and to afford real stability. The resultant Zr oxide/nanographene hybrid solid is stable in saturated NaOH and concentrated H3PO4, allowing a convenient anchoring of H3PO4into its porous matrix to enable size-selective heterogeneous acid catalysis. The Zr oxide components can also be removed by strong hydrofluoric acid to further enhance the surface area (up to 650 m2g?1), without collapsing the nanographene scaffold. The crystallinity order and the extensive thermal transformations were characterized by X-ray diffraction, scanning transmission electron microscopy (STEM), IR, solid state NMR and other instrumental methods.
PROCESSES FOR FORMING GLYCOLS
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Paragraph 0095, (2020/05/28)
This disclosure provides processes for forming glycols by upgrading hydrocarbons. In one embodiment, a process for forming a glycol includes introducing a first ether to a dihydrocarbyl peroxide to form a diether and a first alcohol. The process includes introducing the diether to water to form a glycol and a second alcohol. Processes of this disclosure may include one or more of: introducing a hydrocarbyl hydroperoxide to a third alcohol to form the dihydrocarbyl peroxide; oxidizing a first feed stream comprising a branched hydrocarbon to form the hydrocarbyl hydroperoxide and the first alcohol; and/or introducing the second alcohol to a catalyst to form a second ether.
